| 摘要 |
Railway viaduct or the like, in particular formed of successive prefabricated elements, for example made of concrete, the main part of which has two tracks. In order to allow the establishment of a third track over a short length, widening elements (6) are arranged on either side of a central element (1) of the current type for this viaduct, which widening elements (6) are solidly attached to the central element (1) by at least one transverse prestressing cable (13) which passes through the two widening elements and the upper slab (3) of the central element, and by support pieces (16), for example girders, working in compression between the lower face of a widening element and the region of the lower slab (5) of the central element. <IMAGE>
|
